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    <title>Hello, world!</title>
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<body>
<h1>Hello, world!</h1>

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<div class="alert">
    <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
    <strong>Title!</strong> Alert body ...
</div>

<div class=""
<div class="container-fluid h-1100" id="root">

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    <div class="row h-100">
        <div class="col-md-3 fixed py-3">Page Panel Left</div>
        <div class="col fluid py-3">Page Panel Main Stage

            <div class="bg-warning" style="height:8rem;">I am a header with a fixed height.</div>
            <div class="">I am the content, I should be fluid and stretch to the bottom.</div>
            <div class="bg-warning" style="height:8rem;">I am the footer with a fixed height</div>

        </div>

        <div class="col-md-3 fixed  py-3">Page Panel Right
            <div>
                <br>
                
                <p>Nullam congue, dui luctus aliquam maximus, erat magna posuere purus, posuere elementum urna nisi vitae dolor. Integer tristique non velit ut suscipit. Vestibulum quam eros, blandit dapibus iaculis nec, volutpat vel purus. Quisque commodo euismod
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                    nulla, malesuada non ultrices non, laoreet nec enim. Mauris congue, ipsum non ultrices congue, leo eros tristique urna, bibendum accumsan ligula sem in justo.</p>
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